https://doi.org/10.1051/epjconf/201919901014
Low Energy Antikaon-nucleon/nuclei interaction studies by AMADEUS
1 CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Roma, Italy
2 INFN Laboratori Nazionali di Frascati, Frascati, Rome, Italy
3 Politecnico di Milano, Dip. di Elettronica, Informazione e Bioingegneria, Milano, Italy
4 Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
5 University of Zagreb, Zagreb, Croatia
6 INFN Sezione di Milano, Milano, Italy
7 Stefan-Meyer-Institut für Subatomare Physik, Wien, Austria
8 Università degli Studi di Roma Tor Vergata, Rome, Italy
9 Excellence Cluster ‘Origin and Structure of the Universe’, Garching, Germany
10 Physik Department E12, Technische Universität München, Garching, Germany
11 INFN Sezione di Roma I, Rome, Italy
12 Istituto Superiore di Sanità, Rome, Italy
13 The University of Tokyo, Tokyo, Japan
14 RIKEN, The Institute of Physics and Chemical Research, Saitama, Japan
15 Institute of Physics, Jagiellonian University, Kracow, Poland
16 Departament de Fisica Quantica i Astrofisica and Institut de Ciencies del Cosmos, Universitat de Barcelona, Barcelona, Spain
17 National Centre for Nuclear Research, Warsaw, Poland
* e-mail: kristian.piscicchia@lnf.infn.it
Published online: 1 February 2019
The AMADEUS experiment at the DAΦNE collider of LNF-INFN deals with the investigation of the at-rest, or low-momentum, K− interactions in light nuclear targets, with the aim to constrain the low energy QCD models in the strangeness sector. The 0 step of the experiment consisted in the reanalysis of the 2004/2005 KLOE data, exploiting K− absorptions in H, 4He, 9Be and 12C, leading to the first invariant mass spectroscopic study with very low momentum (about 100 MeV) in-flight K− captures. With AMADEUS step 1 a dedicated pure Carbon target was implemented in the central region of the KLOE detector, providing a high statistic sample of pure at-rest K− nuclear interaction. The first measurement of the non-resonant transition amplitude 
at 
below the K̄N threshold is presented, in relation with the Λ(1405) properties studies. The analysis procedure adopted in the serarch for K− multi-nucleon absorption cross sections and Branching Ratios will be also described.
© The Authors, published by EDP Sciences, 2019
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